'wrongdoing' originates from Old English, specifically the word 'wrang,' where 'wrang' meant 'crooked' or 'twisted,' combined with 'doing,' which comes from 'dōn,' meaning 'to do.'

'wrang' transformed into the Middle English word 'wrong,' and eventually became the modern English word 'wrongdoing' through the combination with 'doing.'

Initially, it meant 'an act that is not right,' but over time it evolved into its current meaning of 'an act that is illegal or immoral.'